Marco Rubio actually said...

"It is tough to enter into future treaties with people that are not complying with existing ones."

"While it is not being considered today, it is something that could potentially be considered in the future."

"I hope that you agree, that the public has a right to know whether or not the U.S. Government believes that Russia is in violation or of noncompliance of any of these treaties."

"I do not support unilateral reductions by the United States as an effort of good will to the world."